I have ATT and I have the note 4. So far is great. I do notice is much more smoother and they took off the ability to check the top menu when on standby mood which is OK but is w.e. I hope we do get Android M soon. Can't wait. Also can't wait for Note 6. I hope they bring back the SD extended and the ability to remove the battery cause I honestly don't think the note 4 is worth upgrading to note 5. In case the phone is overheating...I would like to take the battery out and I would like to upgrade my SD card if anything.

I'm on Sprint, but before I took the OTA, I wiped everything, flashed stock OF5, and then took the OTA. It rebooted like 4 times during the process, but everything finished just fine. I don't know if that will help anyone on AT&T though.

Fantastic update. D/L'd the update 3 times, failed every time. Now my 128GB SD card (wich is nearly full of stuff) is stuck on checking for errors. If this needs a factory reset to get this SD issue fixed, I'm seriously gonna chuck this thing against the wall.

I downloaded the OTA update image twice and it failed at 1% during the install, exactly as others describe.

My phone was stock 5.0.1, never rooted.

Yes, during update I on Wi-Fi, phone placed close to router, phone plugged into charger, microwave oven not on, rabbit's foot next to phone. None of that was the cause of the failure.

I had about 9 GB of free system RAM - should be plenty, right? Not according to some forum posters and according to the installation notes from AT&T. Oh wait. There are never any notes from AT&T. Right.

Read posts on several forums about how to fix it and came up with a couple of things on my own. I was willing to do anything but a factory reset - too much rebuilding since I can't use Titanium Backup. So what did I do? I did them all. And it worked.

And. It. Worked.
.
Here's what I did. Can't tell you which steps were relevant/irrelevant but none of them were a big deal to do/undo. Who cares? If you really must know the answer to this there are some wonderful medications these days to help you with your OCD. Take them.

1. Removed my work email, which needs administrator privileges - my employer requires that I encrypt the device and the SD card
2. I de-encrypted the device (Settings> General tab > Security)
3. I removed a couple of my biggest apps (Waze, Evernote (I keep a lot of notes synced on the device) and a couple of others.
4. My photos and videos are all on the external card so I did not need to remove those - they're all backed up to Google Photos anyway. If yours are in the internal storage, move them to somewhere else.
5. Took the SD card out of the phone.
6. Cleared the cache in Settings> General tab> Storage
7. Cleared the cache individually for Download Manager under Application Manager (the General tab> Storage method does not actually clear all caches, FYI.)
8. Verified that I now had a little over 12 GB of free system RAM out of the total 32 GB.
9. Stopped all background apps using the app switcher.
10. Switched the date/time to manual and set the date to three days from today to trick the update checker.
11. Rebooted the phone in recovery mode so that I could clear the cache partition.
12. Rebooted the phone again from the recovery menu.
13. Burned some sage (Whole Foods), did a couple of Druid incantations (I could only find ones about preventing crop failure - close enough) and I swung the phone around my head exactly 19 times (counter-clockwise, of course.)

The OTA update worked perfectly. Success. 5.1.1 is mine.

1. I put the SD card back in.
2. Put the date/time setting back on automatic.
3. Re-encrypted the device.
4. Restored my work email Exchange account.
5. Reinstalled Waze, Evernote, and the couple of other apps that I had removed.

Was all of that necessary? Probably not. Very likely not. But the update worked, I have 5.1.1 and now my house smells delicious from the sage.

As I periodically remind all of the various machines in my house, "The human always wins." They know this, they understand this, and they know about the e-recycling bin that awaits them otherwise.

The UI is MUCH more responsive - far snappier than one would expect from clearing out memory and rebuilding database indexes alone). App switching is quick. So far (so far) I'm not getting those annoying-as-sh1t delayed home screen refreshes on the Google Now launcher.

Battery life seems to be unaffected. I use only Qualcomm Quick Charge 2.0 compliant chargers (including my car charger) and I carry two hot spare batteries and an external charger when I'm on the road. The Note 6 better have a swappable battery or I'll be a former Samsung customer.

OK, just a little update on my journey. I downloaded and had a failed 5.1.1 install twice. In the process of download/install failure, somehow my practically full 128GB SD card would not mount and it would just be stuck on "checking SD card for errors". I tried everything in my power to correct this issue with nothing but failure. "Mount SD card" is grayed-out in the settings menu and when I remove and reinstall the card, it just goes back to the same "checking" notification. Doesn't even give me an option to format card. I have everything backed-up so no issues there.

After I go to bed, I happen to look over at my phone because the screen was on and low and behold, it was downloading the update for a third time by itself. I decided to stay awake to watch it and an hour later, it was done and ready for install so, I clicked "install". It finally installed 5.1.1 after the third time however, I still do not have a working SD card. The card will work in my computer and I can see and open any of the files on it. Just won't do anything in the phone.

Is any one else getting persistent glitches about twice per day where you try and unlock your phone (unlock in the home screen sense, not unlock the carrier restrictions) and it give a "System UI not responding" message then blacks out on you and glitches back to normal a few seconds later? Mine has been doing that since the update and never did it before.

Also to be fair I'm talking about on the Note Edge and not the Note 4 but...the Not Edge is basically yalls Note 4's weirdo brother so figured they're basically the same thing. Thanks

I downloaded the OTA update image twice and it failed at 1% during the install, exactly as others describe.

My phone was stock 5.0.1, never rooted.

Yes, during update I on Wi-Fi, phone placed close to router, phone plugged into charger, microwave oven not on, rabbit's foot next to phone. None of that was the cause of the failure.

I had about 9 GB of free system RAM - should be plenty, right? Not according to some forum posters and according to the installation notes from AT&T. Oh wait. There are never any notes from AT&T. Right.

Read posts on several forums about how to fix it and came up with a couple of things on my own. I was willing to do anything but a factory reset - too much rebuilding since I can't use Titanium Backup. So what did I do? I did them all. And it worked.

And. It. Worked.
.
Here's what I did. Can't tell you which steps were relevant/irrelevant but none of them were a big deal to do/undo. Who cares? If you really must know the answer to this there are some wonderful medications these days to help you with your OCD. Take them.

1. Removed my work email, which needs administrator privileges - my employer requires that I encrypt the device and the SD card
2. I de-encrypted the device (Settings> General tab > Security)
3. I removed a couple of my biggest apps (Waze, Evernote (I keep a lot of notes synced on the device) and a couple of others.
4. My photos and videos are all on the external card so I did not need to remove those - they're all backed up to Google Photos anyway. If yours are in the internal storage, move them to somewhere else.
5. Took the SD card out of the phone.
6. Cleared the cache in Settings> General tab> Storage
7. Cleared the cache individually for Download Manager under Application Manager (the General tab> Storage method does not actually clear all caches, FYI.)
8. Verified that I now had a little over 12 GB of free system RAM out of the total 32 GB.
9. Stopped all background apps using the app switcher.
10. Switched the date/time to manual and set the date to three days from today to trick the update checker.
11. Rebooted the phone in recovery mode so that I could clear the cache partition.
12. Rebooted the phone again from the recovery menu.
13. Burned some sage (Whole Foods), did a couple of Druid incantations (I could only find ones about preventing crop failure - close enough) and I swung the phone around my head exactly 19 times (counter-clockwise, of course.)

The OTA update worked perfectly. Success. 5.1.1 is mine.

1. I put the SD card back in.
2. Put the date/time setting back on automatic.
3. Re-encrypted the device.
4. Restored my work email Exchange account.
5. Reinstalled Waze, Evernote, and the couple of other apps that I had removed.

Was all of that necessary? Probably not. Very likely not. But the update worked, I have 5.1.1 and now my house smells delicious from the sage.

As I periodically remind all of the various machines in my house, "The human always wins." They know this, they understand this, and they know about the e-recycling bin that awaits them otherwise.

The UI is MUCH more responsive - far snappier than one would expect from clearing out memory and rebuilding database indexes alone). App switching is quick. So far (so far) I'm not getting those annoying-as-sh1t delayed home screen refreshes on the Google Now launcher.

Battery life seems to be unaffected. I use only Qualcomm Quick Charge 2.0 compliant chargers (including my car charger) and I carry two hot spare batteries and an external charger when I'm on the road. The Note 6 better have a swappable battery or I'll be a former Samsung customer.

I tried installing 5.1.1 update three times and all the time it is failing with error after 2% and then showing results "Install interrupted, the software could not be installed." I tried "wiping cache" as well as "cache data" deletion, also I have 5.3 GB available storage on phone. Tried using manual push of software update from AT&T Android support, however still the same error. I don't want to do master reset.

Successful download and install. Cleared system cache. Already noticeable improvement!!
Horrible lagging issue much better! Can't tell if it's as good as it originally was on Kit Kat, but I'm damn happy it no longer is horrible, which it had been since Lollipop update.
Google Play services no longer dominating my battery use when WiFi enabled. I'd been having as much as a 30 minute delay receiving test messages with stock messaging app. So far it is current.
Camera app still very slow to open and operate.
Hopeful......